Possible to have rust-analyzer work similar to neovim?

[StrictlyMonad]

I don't know what I am doing wrong, but rust-analyzer completions seem to perform in a rather odd manner compared to its behaviour in my neovim configuration. I cannot see an obvious tell that could enlighten me about their differences, and the two packages rust-tools.nvim and rustic seem to not get in the way of rust-analyzer doing its magic.

One of the differences is that the completions ar erather different and also where the cursor is placed after the completion has been selected from the menu.

Examples:

Emacs: println! example

println! # + return -> println!

Neovim: println! example

println! # + return -> println!(cursor here)

---

Emacs: fn example:

fn # + return -> fn

Neovim: fn example:

fn # + return ->

fn () {
    # cursor here
}

---

Configuration defined inside rustic :config block:

(setq-default eglot-workspace-configuration
                      '((:rust-analyzer
                         ;; https://rust-analyzer.github.io/manual.html
                         :completion  (:callable (:snippets "fill_arguments"))
                         :checkOnSave (:command "clippy"
                                                  :allTargets :json-false))))

System & Package version:

- Distro: NixOS (unstable branch)
- cargo: 1.69.0
- rust-analyzer: 2023-05-29